Battery charging / discharging system and its control device

Abstract

A battery charging / discharging system according to an embodiment of the present invention may include a cabinet, a plurality of charging / discharging units mounted in an accommodating space formed in the cabinet, a power supply device for supplying power to the plurality of charging / discharging units, and a power transmission device for electrically connecting the power supply device and the plurality of charging / discharging units, wherein the power supply device can simultaneously supply power to at least two of the plurality of charging / discharging units through the power transmission device.

Description

[Technical Field]

[0001] This application claims the benefit of the filing date of Korean Patent Application No. 2023-0159987, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to a battery charge / discharge system and a control device thereof, and more particularly to a battery charge / discharge system utilized in a battery activation process and a control device thereof. [Background technology]

[0003] Secondary batteries are batteries that can be reused by recharging after discharge, and can be used as energy sources for small devices such as mobile phones, tablet PCs, and vacuum cleaners, as well as medium- to large-scale energy sources for personal mobility, automobiles, and smart grid energy storage systems (ESS).

[0004] Depending on the requirements of the system, secondary batteries can be used in the form of assemblies such as a battery module in which a number of battery cells are connected in series and parallel, or a battery rack in which battery modules are connected in series and parallel.

[0005] Battery cells are manufactured through an assembly process and an activation process. Because battery cells are assembled in a discharged state, the activation process after the battery cell assembly process activates the positive electrode active material and forms a surface film (SEI, Solid Electrolyte Interface) on the negative electrode, enabling the battery to function. This activation process is called the formation process. The activation process can be carried out by charging and discharging the battery cell multiple times according to a predefined charge and discharge profile.

[0006] The charge / discharge device for the activation process may include a tray for accommodating batteries, a probe plate disposed on the tray, a channel board electrically connected to each probe included in the probe plate to apply a charge / discharge current to the batteries, and an actuator for raising and lowering the probe plate and the channel board. Generally, to reduce the time required for the activation process, a battery charge / discharge system capable of simultaneously charging and discharging multiple batteries using multiple charge / discharge devices is utilized.

[0007] A typical battery charging / discharging system includes a plurality of charging / discharging devices and a plurality of individual power supply devices that supply power to the charging / discharging devices. Each charging / discharging device is configured to receive power from a corresponding individual power supply device. Therefore, the volume of a cabinet that houses the charging / discharging devices and the power supply devices may increase. If the cabinet volume is limited, the number of charging / discharging devices that can be housed within the cabinet may be reduced. Summary of the Invention [Problem to be solved by the invention]

[0008] SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a battery charge / discharge system that can be used in a battery activation process.

[0009] Another object of the present invention to solve the above problems is to provide a control device for such a battery charge / discharge system.

[0010] Another object of the present invention to solve the above problems is to provide a method for controlling such a battery charge / discharge system. [Means for solving the problem]

[0011] To achieve the above object, according to one embodiment of the present invention, a battery charging / discharging system may include a cabinet, a plurality of charging / discharging units mounted in an accommodating space formed in the cabinet, a power supply device for supplying power to the plurality of charging / discharging units, and a power transmission device for electrically connecting the power supply device and the plurality of charging / discharging units, wherein the power supply device can simultaneously supply power to at least two of the plurality of charging / discharging units through the power transmission device.

[0012] The power transmission device may electrically connect an output side of the power supply device to input / output sides of each of the plurality of charging / discharging units.

[0013] Here, the power transmission device may include a main power transmission member having one side connected to the output side of the power supply device; and a plurality of sub-power transmission members having one side connected to the main power transmission member and the other side connected to each of the input and output sides of the charging / discharging unit.

[0014] The charging / discharging units may be mounted on the cabinet in a stacked structure, and the power supply device may be disposed on an upper or lower layer of the charging / discharging units. Here, the power transmission device may include a main bus bar having one side connected to an output side of the power supply device and the other side extending upward; and a plurality of sub-bus bars having one side connected to the main bus bar and the other sides extending horizontally to be connected to input / output sides of the charging / discharging units, respectively.

[0015] At least two of the plurality of charge / discharge units can be simultaneously charged according to the same charge profile or simultaneously discharged according to the same discharge profile.

[0016] The plurality of charging / discharging units may be classified into a first group and a second group, and when the first group operates in a charging mode, the second group may operate in a discharging mode, and when the first group operates in a discharging mode, the second group may operate in a charging mode, whereby power discharged from the group operating in the discharging mode may be supplied to the group operating in the charging mode through the power transmission device.

[0017] The power supply device may adjust the power output to the power transmission device in response to the power discharged from the group operating in the discharge mode.

[0018] In order to achieve the above-mentioned another object, a control device according to one embodiment of the present invention is a control device for a battery charging / discharging system including a plurality of charging / discharging units, a power supply device, and a power transmission device electrically connecting the power supply device and the plurality of charging / discharging units, and may include at least one processor; and a memory for storing at least one instruction executed through the at least one processor.

[0019] The at least one instruction may include an instruction to classify the plurality of charging / discharging units into a first group and a second group; an instruction to set the first group to a charging mode and the second group to a discharging mode; and an instruction to control the charging / discharging units included in the first group to be simultaneously supplied with power from the power supply device through the power transmission device and charged.

[0020] The instruction to control to be charged may include an instruction to control to charge / discharge units included in the first group simultaneously according to the same charging profile.

[0021] The at least one instruction may further include an instruction to control the charge / discharge units included in the second group to be simultaneously discharged according to the same discharge profile.

[0022] The at least one command may further include a command to adjust the power of the power supply device output to the power transmission device in response to the power discharged from the second group.

[0023] The at least one instruction may further include an instruction to switch the first group to a discharging mode and the second group to a charging mode when the charging process of the first group is completed and the discharging process of the second group is completed.

[0024] To achieve the above-mentioned yet another object, a control method according to one embodiment of the present invention is a control method for a battery charging / discharging system including a plurality of charging / discharging units, a power supply device, and a power transmission device electrically connecting the power supply device and the plurality of charging / discharging units, and includes the steps of classifying the plurality of charging / discharging units into a first group and a second group; setting the first group to a charging mode and setting the second group to a discharging mode; and controlling the charging / discharging units included in the first group to be simultaneously supplied with power from the power supply device through the power transmission device and charged.

[0025] The step of controlling to be charged may include the step of controlling to charge / discharge units included in the first group simultaneously according to the same charging profile.

[0026] The control method may further include controlling the charge / discharge units included in the second group so that they are simultaneously discharged according to the same discharge profile.

[0027] The control method may further include adjusting the power of the power supply device output to the power transmission device in response to the power discharged from the second group.

[0028] The control method may further include a step of switching the first group to a discharging mode and the second group to a charging mode when the charging process of the first group is completed and the discharging process of the second group is completed. [Effects of the Invention]

[0029] According to the above-described embodiments of the present invention, the space efficiency of the battery charging / discharging system is improved, and the number of charging / discharging units accommodated therein can be increased.

[0030] Furthermore, according to the above-described embodiment of the present invention, the power efficiency of the battery charging / discharging system can be improved. [Brief explanation of the drawings]

[0031] [Figure 1] 1 is a block diagram of a battery charging / discharging system according to an embodiment of the present invention. [Figure 2] 1 is a front cross-sectional view of a charge / discharge unit according to an embodiment of the present invention. [Figure 3] 1 shows the layout structure of a battery charging / discharging system according to an embodiment of the present invention. [Figure 4] FIG. 3 is a reference diagram for explaining the operation of the battery charge / discharge system in a first mode according to the embodiment of the present invention. [Figure 5] FIG. 4 is a reference diagram for explaining the operation of the battery charge / discharge system in a second mode according to the embodiment of the present invention. [Figure 6] FIG. 3 is an operational flow diagram of a control method for a battery charge / discharge system according to an embodiment of the present invention. [Figure 7] 1 is a block diagram of a control device of a battery charge / discharge system according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0032] Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, it is understood that this is not intended to limit the present invention to the specific embodiments, but rather to include all modifications, equivalents, or alternatives within the spirit and technical scope of the present invention. Like reference numerals are used to refer to like elements throughout the drawings.

[0033] Terms such as "first," "second," "A," and "B" may be used to describe various components, but the components should not be limited by these terms. These terms are used only to distinguish one component from another. For example, a first component may be termed a "second component," and similarly, a second component may be termed a "first component," without departing from the scope of the present invention. The term "and / or" includes a combination of multiple associated listed items or any of multiple associated listed items.

[0034] When a component is referred to as being "coupled" or "connected" to another component, it is understood that the component may be directly coupled or connected to the other component, but that there may be other components in between. Conversely, when a component is referred to as being "directly coupled" or "directly connected" to another component, it is understood that there are no other components in between.

[0035] The terms used in this application are merely used to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless the context clearly indicates otherwise. It should be understood that in this application, the terms "comprise" or "have" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, and do not preclude the presence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0036] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this invention pertains. Terms as defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted as having an ideal or overly formal meaning unless expressly defined in this application.

[0037] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0038] FIG. 1 is a block diagram of a battery charging / discharging system according to an embodiment of the present invention.

[0039] The battery charging / discharging system according to the embodiment of the present invention may include a cabinet 100 , a plurality of charging / discharging units 200 , a power supply device 300 , a power transmission device 400 , and a control device 500 .

[0040] The cabinet 100 is a structure that accommodates the charging / discharging unit 200, the power supply device 300, and the power transmission device 400. The control device 500 may be accommodated inside the cabinet 100 or may be disposed outside and connected to the charging / discharging unit 200 and the power supply device 300.

[0041] The cabinet 100 may include one or more storage spaces in which the charging / discharging units 200 are placed. Here, the cabinet 100 may include a plurality of storage spaces formed in a multi-layer structure, and the plurality of charging / discharging units 200 may be placed in each of the storage spaces and arranged in a stacked structure.

[0042] The cabinet 100 may include one or more storage spaces in which the power supply device 300 and the control device 500 are placed. Here, the storage spaces for the power supply device 300 and the control device 500 may be provided on one or more of the upper and lower layers of the storage space for the charging / discharging unit 200.

[0043] The charge / discharge unit is a device electrically connected to the battery to perform a charge / discharge process. Here, the battery charge / discharge system may include N charge / discharge units 200-1 to 200-N.

[0044] If each of the charge / discharge units 200-1 to 200-N accommodates a plurality of batteries inside, it can charge and discharge the batteries to activate them.

[0045] The power supply device 300 is a device that supplies power to the charge / discharge unit 200. Here, the power supply device 300 can convert externally supplied power into a predefined voltage and supply the converted voltage to the charge / discharge unit 200. The power supply device 300 may include at least one of an AC / DC inverter for converting an AC voltage into a DC voltage and a DC / DC converter for reducing the DC voltage.

[0046] The power transmission device 400 is a device that electrically connects the charging / discharging unit 200 and the power supply device 300 and transmits power output from the power supply device 300 to the charging / discharging unit 200. Here, the power transmission device 400 may be configured to include at least one of a cable and a bus bar.

[0047] The power transmission device 400 electrically connects the output side of the power supply device 300 to the input / output sides of each of the charge / discharge units 200-1 to 200-N, and can transmit the DC voltage output from the power supply device 300 to each of the charge / discharge units 200-1 to 200-N.

[0048] The power transfer device 400 may include one or more circuit breakers disposed on the power transfer path.

[0049] The power supply device 300 can simultaneously supply power to at least two or more of the charging / discharging units 200 through the power transmission device 400. That is, input / output sides of the plurality of charging / discharging units and the output side of the power supply device 300 are connected to nodes having the same potential, so that power output from the power supply device 300 can be collectively supplied to the plurality of charging / discharging units.

[0050] The control device 500 can control the operation of the charge / discharge units 200. Here, the control device 500 can control the operation mode of each of the charge / discharge units 200. For example, the control device 500 can control at least some of the charge / discharge units 200-1 to 200-N to operate in a charge mode, and the remaining some to operate in a discharge mode.

[0051] The control device 500 may control the charge / discharge unit so that the battery is charged / discharged according to a predefined charge / discharge profile, where the charge / discharge profile may include a current value, a voltage value, and a power value for each unit time.

[0052] FIG. 2 is a front cross-sectional view of a charging / discharging unit according to an embodiment of the present invention.

[0053] Referring to FIG. 2, the charge / discharge unit may include a tray 210, a probe plate 220, and a channel board 230.

[0054] The tray 210 is a structure that accommodates a plurality of battery cells. Here, the tray 210, with the plurality of battery cells accommodated therein, may be transferred through a transfer device and placed inside the charge / discharge unit. Furthermore, once the charge / discharge process by the charge / discharge unit is completed, the tray 210 may be ejected to the outside through the transfer device and transferred to an apparatus for another process.

[0055] The probe plate 220 is disposed on the upper portion of the tray 210 and may include a plurality of positive and negative contact pins, the number of which corresponds to the number of battery cells.

[0056] The positive and negative contact pins are arranged at positions corresponding to the positive and negative electrodes of the battery cell, respectively, and when a charge / discharge process is performed, the probe plate 220 descends to make electrical contact with the positive and negative electrodes of the battery cell.

[0057] 2 is a single plate including both a positive electrode contact pin and a negative electrode contact pin. However, unlike in FIG. 2, the probe plate may be embodied as a separate structure including a positive electrode probe plate disposed on the upper side of the tray 210 and a negative electrode probe plate disposed on the lower side of the tray 210. In this case, when the tray 210 is placed inside the charge / discharge unit through a transfer device, the negative electrode contact pin of the negative electrode probe plate comes into contact with the negative electrode of the battery cell, and then, when the positive electrode probe plate is lowered, the positive electrode contact pin comes into contact with the positive electrode of the battery cell.

[0058] The channel board 230 is electrically connected to the positive and negative contact pins included in the probe plate 210 to apply current for charging and discharging the battery. Here, the channel board 230 can be operated by receiving power from the power supply device 300 shown in FIG.

[0059] The channel board 230 may include a distribution circuit for distributing the supplied power among the battery cells so that each of the battery cells can be charged or discharged according to a predefined charging profile.

[0060] FIG. 3 shows the layout structure of a battery charging / discharging system according to an embodiment of the present invention.

[0061] The cabinet 100 may include an upper frame 110 and a lower frame 120 .

[0062] The upper frame 110 may include a plurality of accommodating spaces formed in a multi-layer structure, and the charging / discharging units 200-1 to 200-N may be placed in the accommodating spaces respectively and arranged in a stacked structure.

[0063] The lower frame 120 is disposed below the upper frame 110 and may house the power supply device 300 and the control device 500 therein.

[0064] Meanwhile, unlike FIG. 3, the charge / discharge units 200-1 to 200-N may be disposed on the lower frame 120, and the power supply device 300 and the control device 500 may be disposed on the upper frame 110. In this case, as shown in FIG.

[0065] If each of the charge / discharge units 200-1 to 200-N accommodates a plurality of batteries inside, it can charge and discharge the batteries to activate them.

[0066] The power supply device 300 can convert externally supplied power into a predefined voltage and supply it to each channel board of the charging / discharging unit 200. Here, the power supply device 300 can be electrically connected to each channel board of the charging / discharging units 200-1 to 200-N through a power transmission device.

[0067] The power transmission device may include a main power transmission member 410 and a plurality of sub-power transmission members 420-1 to 420-N. One side of the main power transmission member 410 may be connected to the output side of the power supply device 300. One side of each of the sub-power transmission members 420-1 to 420-N may be connected to the main power transmission member 410, and the other side may be connected to the channel board of the corresponding charging / discharging unit 200-1 to 200-N. That is, as shown in FIG. 3, the input / output sides of the charging / discharging units 200-1 to 200-N and the output side of the power supply device 300 may be connected to nodes having the same potential. As a result, power output from the power supply device 300 may be integrally supplied to the respective channel boards of the plurality of charging / discharging units 200-1 to 200-N.

[0068] Each of the sub-power transmission members 420-1 to 420-N may include one or more circuit breakers disposed on a power transmission path. The circuit breakers may be controlled to be turned on or off by the control device 500.

[0069] In an embodiment, the power transmission device may include a main power bus bar and a plurality of sub-bus bars, i.e., the main power transmission member 410 and each of the plurality of sub-power transmission members 420-1 to 420-N may be embodied as a bus bar.

[0070] Here, the main bus bar may have one side connected to the output side of the power supply device 300 and the other side extending upward. In addition, each of the sub-bus bars may have one side connected to the main bus bar and the other side extending horizontally to be connected to the channel board of the corresponding charging / discharging unit 200-1 to 200-N. That is, the input / output sides of the charging / discharging units 200-1 to 200-N and the output side of the power supply device 300 may be connected to bus bars having the same potential. As a result, power output from the power supply device 300 may be integrally supplied to each channel board through the main bus bar and the sub-bus bars.

[0071] FIG. 4 is a reference diagram for explaining the operation of the battery charging / discharging system in the first mode according to an embodiment of the present invention, and FIG. 5 is a reference diagram for explaining the operation of the battery charging / discharging system in the second mode according to an embodiment of the present invention.

[0072] 4 and 5 show a battery charge / discharge system in which four charge / discharge units #1 to #4 are housed in a stacked structure. The structure of the battery charge / discharge system shown in Figs. 4 and 5 is an example for explaining the operation of the battery charge / discharge system according to the embodiment of the present invention, and the scope of the present invention is not limited to this structure.

[0073] The power transmission device may include a main bus bar 410' and a plurality of sub-bus bars 420'-1 to 420'-4. One side of the main bus bar 410' may be connected to the output side of the power supply device 300, and the other side may extend upward. Also, one side of each of the sub-bus bars 420'-1 to 420'-4 may be connected to the main bus bar 410', and the other side may extend horizontally to be connected to a channel board of a corresponding charging / discharging unit.

[0074] At least two of the multiple charge / discharge units can be simultaneously charged according to the same charge profile or simultaneously discharged according to the same discharge profile. For example, #1 and #2 of the charge / discharge units can be simultaneously charged according to the same charge profile, and #3 and #4 can be simultaneously discharged according to the same discharge profile.

[0075] The plurality of charge / discharge units may be classified into a first group and a second group, where the first group operates in a charge mode while the second group operates in a discharge mode, and the first group operates in a discharge mode while the second group operates in a charge mode.

[0076] For example, among the charge / discharge units, #1 and #2 may be defined as a first group, and #3 and #4 may be defined as a second group. When the battery charge / discharge system operates in a first mode, the first group (#1 and #2) may operate in a charge mode, and the second group (#3 and #4) may operate in a discharge mode, as shown in FIG. 4. When the battery charge / discharge system operates in a second mode, the first group (#1 and #2) may operate in a discharge mode, and the second group (#3 and #4) may operate in a charge mode, as shown in FIG. 5. The setting of the first group and the second group and the switching between the first mode and the second mode may be performed by the control device 500.

[0077] 4 and 5, power discharged from a group operating in a discharging mode may be supplied to a group operating in a charging mode through a power transmission device. For example, in the first mode, as shown in FIG. 4, discharge power output from the second group (#3 and #4) may be transmitted to the first group (#1 and #2) through the sub-busbars 420'-1 to 420'-4 and the main busbar 410'. As another example, in the second mode, as shown in FIG. 5, discharge power output from the first group (#1 and #2) may be transmitted to the second group (#3 and #4) through the sub-busbars 420'-1 to 420'-4 and the main busbar 410'.

[0078] Since the first group and the second group are set to different operation modes and the charging and discharging processes are performed simultaneously, the output power of the power supply device 300 is reduced, thereby improving the power efficiency of the battery charging and discharging system.

[0079] The power supply device 300 may adjust the power output to the power transmission device in response to the power discharged from the group operating in the discharging mode. Specifically, if the first group and the second group include different numbers of charge / discharge units, the power supply device 300 may adjust the amount of output power based on the number of charge / discharge units included in the group operating in the discharging mode. For example, if the first group includes four charge / discharge units and the second group includes six charge / discharge units, when switching from the first mode (first group - charge mode, second group - discharge mode) to the second mode (first group - discharge mode, second group - charge mode), the power output from the power supply device 300 may increase in response to the reduction in the power discharged to the power transmission device. Conversely, when switching from the second mode to the first mode, the power output from the power supply device 300 may decrease in response to the increase in the power discharged to the power transmission device. Meanwhile, the control device 500 transmits a control signal for adjusting the amount of output power to the power supply device 300, and the power supply device 300 can adjust the amount of output power according to the control signal.

[0080] 6 is a flow chart illustrating an operation of a control method for a battery charging / discharging system according to an embodiment of the present invention. The control method described below can be performed by a control device included in the battery charging / discharging system.

[0081] The control device may classify the charging / discharging units included in the battery charging / discharging system into a first group and a second group (S610).

[0082] The control device can set a charge / discharge mode for each of the groups (S620). For example, the control device can set the first group to a charge mode and the second group to a discharge mode.

[0083] Thereafter, the control device can control the operation of each of the groups so that the charging / discharging process is performed according to the charging / discharging mode set in S620 (S630).

[0084] Specifically, the control device may control the charging / discharging units included in the first group to be simultaneously supplied with power from the power supply device through the power transmission device and charged, and the control device may control the charging / discharging units included in the first group to be simultaneously charged according to the same charging profile.

[0085] The control device may also control the charge / discharge units included in the second group so that the charge process and the discharge process of the first group are performed simultaneously, where the control device may control the charge / discharge units included in the second group so that they are simultaneously discharged according to the same discharge profile.

[0086] The control device can adjust the power of the power supply device output to the power transmission device side in response to the power discharged from the second group.

[0087] When the charging / discharging process of the group is completed, the control device can switch the charging / discharging mode of each group (S640). Specifically, when the charging process of the first group is completed and the discharging process of the second group is completed, the control device can switch the first group to the discharging mode and the second group to the charging mode.

[0088] Thereafter, the control device can control the operation of each of the groups so that the charging / discharging process is performed in accordance with the charging / discharging mode switched in S640 (S650).

[0089] Specifically, the control device may control the charging / discharging units included in the second group to be simultaneously supplied with power from the power supply device through the power transmission device and charged, and the control device may control the charging / discharging units included in the second group to be simultaneously charged according to the same charging profile.

[0090] The control device may also control the charge / discharge units included in the first group so that a discharge process is performed simultaneously with a charge process of the second group, where the control device may control the charge / discharge units included in the first group so that they are simultaneously discharged according to the same discharge profile.

[0091] When the charge / discharge process of the group is completed, the control device may check whether the charge / discharge process has been performed for a predefined target number of cycles (S660). If the accumulated number of cycles is less than the target number of cycles (N in S660), the control device may switch the charge / discharge mode of each of the groups (S640) and control the operation of each of the groups so that the charge / discharge process is performed according to the switched charge / discharge mode (S650). If the accumulated number of cycles is the same as the target number of cycles (Y in S660), the control device may terminate the charge / discharge process for battery activation and switch the battery charging / discharging system to a stop mode.

[0092] FIG. 7 is a block diagram of a control device of a battery charge / discharge system according to an embodiment of the present invention.

[0093] The control device 500 according to an embodiment of the present invention can be located in a battery charging / discharging system including a plurality of charging / discharging units, a power supply device, and a power transmission device electrically connecting the power supply device and the plurality of charging / discharging units.

[0094] The control device 500 may include at least one processor 510, a memory 520 for storing at least one instruction executed by the processor, and a transceiver 530 for communicating with a network.

[0095] The at least one instruction may include an instruction to classify the plurality of charging / discharging units into a first group and a second group; an instruction to set the first group to a charging mode and the second group to a discharging mode; and an instruction to control the charging / discharging units included in the first group to be simultaneously supplied with power from the power supply device through the power transmission device and charged.

[0096] The instruction to control to be charged may include an instruction to control to charge / discharge units included in the first group simultaneously according to the same charging profile.

[0097] The at least one instruction may further include an instruction to control the charge / discharge units included in the second group to be simultaneously discharged according to the same discharge profile.

[0098] The at least one command may further include a command to adjust the power of the power supply device output to the power transmission device in response to the power discharged from the second group.

[0099] The at least one instruction may further include an instruction to switch the first group to a discharging mode and the second group to a charging mode when the charging process of the first group is completed and the discharging process of the second group is completed.

[0100] The control device 500 may further include an input interface device 540, an output interface device 550, a storage device 560, etc. The components included in the control device 500 are connected by a bus 570 to communicate with each other.

[0101] Here, the processor 510 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which the method according to the embodiment of the present invention is performed. The memory (or storage device) may be composed of at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory may be composed of at least one of a read-only memory (ROM) and a random access memory (RAM).

[0102] The operations of the methods according to the embodiments of the present invention can be embodied as a computer-readable program or code on a computer-readable recording medium. The computer-readable recording medium includes all kinds of storage devices in which data that can be read by a computer system is stored. In addition, the computer-readable recording medium can be distributed among computer systems connected via a network, so that the computer-readable program or code can be stored and executed in a distributed manner.

[0103] Some aspects of the invention have been described in the context of an apparatus, but they may also be described in terms of a corresponding method, where a block or apparatus corresponds to a method step or feature of a method step. Similarly, aspects described in the context of a method may be described in terms of a corresponding block or item or feature of a corresponding apparatus. Some or all of the method steps may be performed by (or using) a hardware apparatus, such as a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, one or more of the most important method steps may be performed by such an apparatus.

[0104] Although the present invention has been described above with reference to preferred embodiments, those skilled in the art will understand that various modifications and variations can be made to the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. [Explanation of symbols]

[0105] 100: Cabinet 200: Charging / discharging unit 300: Power supply device 400: Power transmission device 500: Control device

Claims

1. A battery charging / discharging system, cabinet; a plurality of charging / discharging units placed in an accommodating space formed in the cabinet; a power supply device that supplies power to the plurality of charging / discharging units; and a power transmission device electrically connecting the power supply device and the plurality of charging / discharging units; The power supply device is A battery charging / discharging system that simultaneously supplies power to at least two or more of the plurality of charging / discharging units through the power transmission device.

2. The power transmission device is The battery charging / discharging system according to claim 1 , wherein an output side of the power supply device is electrically connected to an input / output side of each of the plurality of charging / discharging units.

3. The power transmission device is a main power transmission member, one side of which is connected to the output side of the power supply device; and The battery charging / discharging system according to claim 2 , further comprising a plurality of sub-power transmission members, one side of which is connected to the main power transmission member and the other side of which is connected to input / output sides of the charging / discharging unit, respectively.

4. The charging / discharging unit is mounted on the cabinet in a stacked structure, the power supply device is disposed above or below the charging / discharging unit; The power transmission device is a main bus bar having one side connected to the output side of the power supply device and the other side extending upward; and The battery charging / discharging system according to claim 1 , further comprising a plurality of sub-bus bars, one side of which is connected to the main bus bar and the other side of which extends horizontally and is connected to each of the input and output sides of the charging / discharging unit.

5. At least two of the plurality of charge / discharge units are 10. The battery charging / discharging system of claim 1, wherein the batteries are simultaneously charged according to the same charging profile or simultaneously discharged according to the same discharging profile.

6. The plurality of charging / discharging units are classified into a first group and a second group; When the first group operates in a charging mode, the second group operates in a discharging mode; The battery charging / discharging system according to claim 1 , wherein when the first group operates in a discharging mode, the second group operates in a charging mode.

7. The battery charging / discharging system according to claim 6 , wherein power discharged from the group operating in the discharging mode is supplied to the group operating in the charging mode through the power transmission device.

8. The power supply device is 8. The battery charging / discharging system according to claim 7, wherein the power output to the power transmission device is adjusted in response to the power discharged from the group operating in the discharge mode.

9. A control device for a battery charging / discharging system including a plurality of charging / discharging units, a power supply device, and a power transmission device that electrically connects the power supply device and the plurality of charging / discharging units, at least one processor; and a memory for storing at least one instruction to be executed by said at least one processor; The at least one instruction: instructions for classifying the plurality of charging / discharging units into a first group and a second group; instructions for setting the first group in a charging mode and the second group in a discharging mode; and A control device for a battery charging / discharging system, the control device including an instruction to control the charging / discharging units included in the first group so that they are simultaneously supplied with power from the power supply device through the power transmission device and charged.

10. The instruction to control charging is The control device for a battery charging / discharging system according to claim 9 , further comprising an instruction for controlling the charging / discharging units included in the first group so that they are simultaneously charged according to the same charging profile.

11. The at least one instruction: The control device for a battery charging / discharging system according to claim 9 , further comprising an instruction to control the charging / discharging units included in the second group so that they are simultaneously discharged according to the same discharge profile.

12. The at least one instruction: The control device for a battery charging / discharging system according to claim 9 , further comprising a command to adjust the power of the power supply device output to the power transmission device in response to the power discharged from the second group.

13. The at least one instruction:

13. The control device for a battery charging / discharging system according to claim 9, further comprising an instruction to switch the first group to a discharging mode and the second group to a charging mode when the charging process of the first group is completed and the discharging process of the second group is completed.

14. A method for controlling a battery charging / discharging system including a plurality of charging / discharging units, a power supply device, and a power transmission device electrically connecting the power supply device and the plurality of charging / discharging units, the method comprising: classifying the plurality of charging / discharging units into a first group and a second group; setting the first group in a charging mode and the second group in a discharging mode; and A method for controlling a battery charging / discharging system, comprising: controlling the charging / discharging units included in the first group so that they are simultaneously supplied with power from the power supply device through the power transmission device and charged.

15. The step of controlling to be charged includes: The method for controlling a battery charging / discharging system according to claim 14 , comprising the step of controlling the charging / discharging units included in the first group so that they are simultaneously charged according to the same charging profile.

16. The method of claim 14 , further comprising the step of controlling the charge / discharge units included in the second group so that they are simultaneously discharged according to the same discharge profile.

17. The method of claim 14 , further comprising adjusting the power of the power supply device output to the power transmission device in response to the power discharged from the second group.

18. 18. The method for controlling a battery charging / discharging system according to claim 14, further comprising the step of switching the first group to a discharging mode and the second group to a charging mode when the charging process of the first group is completed and the discharging process of the second group is completed.

Images